Study of Isotope Effect Upon Lithium Iodide Complexation with Benzo-15-Crown-5 in Water–Chloroform Extraction System

N. A. Shokurova^a, L. I. Demina^a,^b, V. I. Zhilov^a,^b, S. V. Demin^a,^b, and A. Yu. Tsivadze^aTranslated by I. Kudryavtsev

^aFrumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991 Russia

^bKurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991 Russia

Correspondence to: e-mail: zhilov@igic.ras.ru

Received 3 September, 2015

Abstract—Extraction characteristics of chloroform–water system in lithium iodide extraction with benzo-15-crown-5 (B15C5) were studied. The complexation of the crown ether with LiI in organic phase was shown by IR spectroscopy. Isotope effect multiplication was performed by extraction chromatography technique. The magnitude of isotope separation factor (α) for ⁶Li-⁷Li pair was 1.017. The light lithium isotope is concentrated in organic phase.

DOI: 10.1134/S0036023616060176